wpf - 在 wpf 中传递给 MultiBinding 的语法问题

Question

我尝试将 CommandParameter 从简单绑定传递到 MultiBinding，但在下面的多绑定示例中找不到“{Binding}”的语法。非常感谢任何提示！

问候，法比亚努斯

    <Button Content="Add subevent" HorizontalAlignment="Left" MinWidth="100" Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.AddEvent}" CommandParameter="{Binding}" />

带有 MultiBinding 的 CommandParameter：

                    <Button Content="Add subevent" HorizontalAlignment="Left" MinWidth="100" Command="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType={x:Type Window}}, Path=DataContext.AddEvent}" >
                    <Button.CommandParameter>
                        <MultiBinding Converter="{StaticResource searchFilterConverter}">
                            <Binding Path="" />
                            <Binding RelativeSource="{RelativeSource Mode=FindAncestor,AncestorType=Window}"  Path="DataContext.SelectedProduct"  />
                        </MultiBinding>
                    </Button.CommandParameter>
                </Button>